My left arm often 'forgets' what it is supposed to be doing and will move - so the heaviness of mine helps my arm to remember. If I used a light one like Mike's or David's I'd bet I would end up pushing into the canvas too hard. Perhaps it is just a concentration issue for me. No blonde jokes please
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Kim
http://kimberlydow.com
"Speak your mind, even if your voice shakes." - Maggie Kuhn
"If you obey all the rules, you'll miss all the fun." - Katherine Hepburn